Omnisharp-vscode: launch.json changed how to start with specific page

[jtsom]

Issue Description

A recent change seems to have changed the structure of the launch.json file. I need to launch a specific page when I start my project (an API web app).

Steps to Reproduce

In a Dotnet web application, choose the .NET Generate Assets for Build and Debug.

Expected Behavior

Be able to launch a specific page. Previous launch.json had this configuration:

Actual Behavior

After (re)generating the launch.json (and tasks.json file, which also changed format), the file looks like:

I'm not sure if I should add the launchBrowser section (as it launches the browser already, but tries to go the default page).

Logs

OmniSharp log

Nothing related to launching a file.

C# log

Empty

Environment information

VSCode version: 1.38.0-exploration
C# Extension: 1.21.2-beta1

Dotnet Information

.NET Core SDK (reflecting any global.json):
Version: 3.0.100-preview8-013656
Commit: 8bf06ffc8d

Runtime Environment:
OS Name: Windows
OS Version: 10.0.18362
OS Platform: Windows
RID: win10-x64
Base Path: C:Program Filesdotnetsdk3.0.100-preview8-013656

Host (useful for support):
Version: 3.0.0-preview8-28405-07
Commit: d01b2fb7bc

.NET Core SDKs installed:
2.1.700 [C:Program Filesdotnetsdk]
2.1.800 [C:Program Filesdotnetsdk]
2.2.300 [C:Program Filesdotnetsdk]
2.2.301 [C:Program Filesdotnetsdk]
2.2.400 [C:Program Filesdotnetsdk]
3.0.100-preview8-013656 [C:Program Filesdotnetsdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.11 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.12 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.6 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.11 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.12 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.6 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.0-preview8.19405.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.11 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.1.12 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.2.5 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.2.6 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 3.0.0-preview8-28405-07 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.0.0-preview8-28405-07 [C:Program FilesdotnetsharedMicrosoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

Visual Studio Code Extensions

|Extension|Author|Version|
|---|---|---|
|auto-close-tag|formulahendry|0.5.6|
|auto-rename-tag|formulahendry|0.1.0|
|azure-account|ms-vscode|0.8.4|
|csharp|ms-vscode|1.21.2-beta1|
|debugger-for-chrome|msjsdiag|4.11.7|
|linux-themes|SolarLiner|1.0.1|
|material-icon-theme|PKief|3.9.0|
|monokai-plusplus|dcasella|1.6.10|
|ng-template|Angular|0.802.3|
|night-owl|sdras|1.1.3|
|night-wolf|MaoSantaella|1.8.0|
|one-monokai|azemoh|0.3.7|
|output-colorizer|IBM|0.1.2|
|theme-cobalt2|wesbos|2.1.6|
|theme-panda|tinkertrain|1.3.0|
|vetur|octref|0.22.2|
|vscode-azurefunctions|ms-azuretools|0.18.1|
|vscode-cosmosdb|ms-azuretools|0.10.2|
|vscode-eslint|dbaeumer|1.9.1|
|vscode-typescript-tslint-plugin|ms-vscode|1.2.2|
|vscodeintellicode|VisualStudioExptTeam|1.1.9|;

[jtsom]

I found https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md but it doesn't specify how to launch a specific page (ie. http://localhost:5000/swagger/index.html)

[gregg-miskelly]

@jtsom you want to look at this part of the instructions

Ex: "uriFormat": "http://localhost:5000/swagger/index.html"

[gregg-miskelly]

Or I think this would better match what you had before:

    "serverReadyAction": {
        "action": "openExternally",
        "pattern": "^\\s*Now listening on:\\s+(https?://\\S+)",
        "uriFormat": "%s/swagger"
    }

[jtsom]

Unfortunately it still tries to open the browser to http://localhost:5000 with no further path...

[gregg-miskelly]

You get this even if you set uriFormat to exactly what you want (Ex: "uriFormat": "http://localhost:5000/swagger/index.html")?

[jtsom]

Yes. It doesn't matter what I put in uriFormat, it always defaults to http://localhost:5000 (in this case). That doesn't seem to specify what the launch url is. I think that needs to be set elsewhere?

[jtsom]

Ok. Did more testing.

Setting the pattern to: "^\\s*Now listening on:\\s+https?://\\S+"
and the uriFormat to: "http://localhost:5000/swagger"
causes the right page to launch. But to not have to hard code the port (or url), trying to use the %s substitution doesn't seem to work:
"pattern": "^\\s*Now listening on:\\s+(https?://\\S+)",
"uriFormat": "http://localhost:%s/swagger" or %s/swagger"

[gregg-miskelly]

The behavior you are seeing isn't how I thought VS Code designed this feature, but it sounds like there is a bug open to change it: https://github.com/microsoft/vscode/issues/79596

[gregg-miskelly]

For future reference, here is the VS Code source code for handling serverReadyAction: https://github.com/microsoft/vscode/blob/bd9458e6b8cf2f24bbc759520795998a071a6db2/extensions/debug-server-ready/src/extension.ts#L114

[gregg-miskelly]

I will leave this bug open to see what updates, if any, we should make to our documentation once VS Code resolves that issue.